Yawns are more contagious among people with closer relationships.
163
40% of people who are rejected in romantic love slip into clinical depression.
72
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Men fall in love faster than women do.
32
Gary Kremen, founder of match.com, lost his girlfriend to a man she met on match.com.
69
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20